//x = 1
// y = 0

x1->1x
x0->0x
y1->1y
y0->0y
0y->*0
1y->*1
0x->*1
1x->*1

0@->@0
1@->@1
|*->@

1|->|x
0|->|y
|0->|

*1->1
*0->0
@0->@
@1->.1
|1->.1
@->.0

